| 1 | /*- |
| 2 | * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * |
| 14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 24 | * SUCH DAMAGE. |
| 25 | * |
| 26 | * $FreeBSD: src/sys/boot/i386/libi386/i386_copy.c,v 1.10 2003/08/25 23:28:31 obrien Exp $ |
| 27 | * $DragonFly: src/sys/boot/pc32/libi386/i386_copy.c,v 1.3 2003/11/10 06:08:36 dillon Exp $ |
| 28 | */ |
| 29 | |
| 30 | /* |
| 31 | * MD primitives supporting placement of module data |
| 32 | * |
| 33 | * XXX should check load address/size against memory top. |
| 34 | */ |
| 35 | #include <stand.h> |
| 36 | |
| 37 | #include "libi386.h" |
| 38 | #include "btxv86.h" |
| 39 | |
| 40 | #define READIN_BUF (16 * 1024) |
| 41 | |
| 42 | ssize_t |
| 43 | i386_copyin(const void *src, vm_offset_t dest, const size_t len) |
| 44 | { |
| 45 | if (dest + len >= memtop) { |
| 46 | errno = EFBIG; |
| 47 | return(-1); |
| 48 | } |
| 49 | |
| 50 | bcopy(src, PTOV(dest), len); |
| 51 | return(len); |
| 52 | } |
| 53 | |
| 54 | ssize_t |
| 55 | i386_copyout(const vm_offset_t src, void *dest, const size_t len) |
| 56 | { |
| 57 | if (src + len >= memtop) { |
| 58 | errno = EFBIG; |
| 59 | return(-1); |
| 60 | } |
| 61 | |
| 62 | bcopy(PTOV(src), dest, len); |
| 63 | return(len); |
| 64 | } |
| 65 | |
| 66 | |
| 67 | ssize_t |
| 68 | i386_readin(const int fd, vm_offset_t dest, const size_t len) |
| 69 | { |
| 70 | void *buf; |
| 71 | size_t resid, chunk, get; |
| 72 | ssize_t got; |
| 73 | |
| 74 | if (dest + len >= memtop) |
| 75 | return(0); |
| 76 | |
| 77 | chunk = min(READIN_BUF, len); |
| 78 | buf = malloc(chunk); |
| 79 | if (buf == NULL) |
| 80 | return(0); |
| 81 | |
| 82 | for (resid = len; resid > 0; resid -= got, dest += got) { |
| 83 | get = szmin(chunk, resid); |
| 84 | got = read(fd, buf, get); |
| 85 | if (got <= 0) |
| 86 | break; |
| 87 | bcopy(buf, PTOV(dest), (size_t)got); |
| 88 | } |
| 89 | free(buf); |
| 90 | return(len - resid); |
| 91 | } |